Did solve it by reinstalling BN2 again. Now I started to enable plugins step by step. Assume that plugin conflict lead to bad status of gizmo. Could have been an old version of active sky plugin.
I will test further and post in case I could identify the previous issue.
My GNS and autopilot did stop working. Seems to be a conflict with Plugins. However it started only working again when I disabled all Plugins including Gizzmo. And without Gizzmo I have no license and can't fly. Any suggestions what to do?